Electric-switch contact.



No. 783,652. PATENTED FEB. 28, 1905. W. C. TREGONINC.

ELECTRIC SWITCH CONTACT.

APPLICATION FILED MAY 24. 1904.

Patented February 28, 1905.

"Enrica.

WILLIAM C. TREG-ONING, OF HARTFORD, CONNFCTTCUT, ASSIG-NOR, BY MESNE ASSIGNMENTS, TO PERKINS CORPORATION, OF thtltllliOltl), CONNECTICUT, A CORPORATTON OF CONNECTlTlC/UT.

EMECTFHC $WTTGH CO NTI TCT.

SPECIFICATION forming part of Letters Patent N0. 783,652, dated February 28, 1905.

Application filed May 24. 1904- Serial No. 209,552.

To all 1071 0711, it ntrty err/merit.-

Be it known that l, VILLIAM C. TjaneomNe, a citizen of the United States, residing at Hartiord, in the county of Hartford and State of Connecticut, have invented a new and useful Electric-Switch Contact, of which the following is a specification.

This invention relates to the construction of spring-arm contacts which are adapted to receive the rotary or oscillating blades of turnbutton or push-button snap-switches.

The object of the invention is to produce an efiicient construction which is simple and cheap to manufacture and assemble.

The embodiment of the invention illustrated in the accompanying drawings has a tubular post that is attached to a supporting-plate and is provided with a binding-screw, also a pair of spring-plates which are stamped with flanged perforations and are applied flange to flange on a swaged portion of the post.

Figure l of the illustrations shows a side elevation of a contact that embodies the invention. Fig. 2 shows a plan of the same. Fig. 3 shows a vertical section of the contact. Fig. t shows a plan of one of the contact-plates, and Fig. 5 shows a section of one of the contact-plates.

The tubular post 1 of this contact is attached in any convenient manner to the supportingplate 2, which is adapted to be secured to the base of the switch. A binding-screw 3 extends into the opening through the post, so as to clamp the end of a circuit-Wire that is thrust therein.

1n the manufacture of this contact it is preferred to swage both ends of the post into a hexagonal form; but of course the ends could be made square or octagonal, if desired. One end is thrust through an opening in the sup porting plate and headed over, and on the other end the contact-plates are placed, and then that end is headed over.

The contact-plates t are the same shape and l size.

ably a hexagonal perforation is punched in each and portions of the metal about the hole are stamped down, so as to form a flange 5, with an opening which fits the upper end of the post. These plates are placed on the angular end of the post with the flanges together, so that the plates are slightly separated, and their ends are bent down, so that the springarms 6 will grip the blade of the switch that is thrown between them. After the plates have been placed on the angular end of the post the end is headed, over to hold them in position. The flanges separate the plates sufiiciently without the interposition of any washers, and the angu larity of the openings through the plates and the end of the post prevents the plates from turning on the post.

This contact is very simple to manufacture, for the ends of the post may both be swaged alike. and the plates are identical. The parts are easy to assemble, for no washers are required.

The invention claimed is- 1. A switch-contact having a post with an angular end and plates with flanges and angular openings fitting the angular end of the post, substantially as specified.

2. A switch-contact having a post with an angular section at each end, a supportingplate located on the angular section at one end, and a pair 01' plates with flanges and angular openings located on the other angular end of the post, substantially as specified.

3. A contact-plate having contact-arms and an integral flange extending from one side, and provided with an angular opening, substantially as specified.

VVTLLIAM C. 'IREGONTNG.

\Vitnesses:

ETHEL M. Lows, HARRY It. WiinJAiis.

When these plates are formed, prefer- 

